He ne laser ppt
focussing lens. He:Ne laser. axicon doublet. - PowerPoint PPT Presentation Recommended. Mitogenic potential inducible by He:Ne laser in human lymphocytes in vitro. WAVE OPTICS & LASER. Interference Air-Wedge Theory and Applications LASER Types of LASER Nd:YAG LASER, CO 2 LASER, Semiconductor LASER (homojuntion). Helium-Neon laser is also known as He-Ne laser. What is a gas laser? A gas laser is a type of laser in which a mixture of gas is used as the active medium or laser medium. Gas lasers are the most widely used lasers. Gas lasers range from the low power helium-neon lasers to the very high power carbon dioxide lasers. THE He-Ne LASER The He-Ne laser was first fabricated by Ali Javan and co-workers at Bell Telephone Laboratories in the United States. This was also the first gas laser to be operated successfully. The He-Ne laser consists of a mixture of He and Ne in a ratio of about , placed inside a long, narrow discharge tube (see Figs. and ).